RFR: 8373876: StackWalkNativeToJava print more output in case of failures [v2]

[Matthias Baesken]

> In case of failures the jtreg test StackWalkNativeToJava sometimes misses to print the 'bad' output we check. This makes analyzing errors hard, so better enhance the output .
> The other checks ` output.shouldNotContain`   print already the diagnostic summary of output.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  Adjust check a little as suggested by David

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28871/files
  - new: https://git.openjdk.org/jdk/pull/28871/files/23309329..a703276f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28871&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28871&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28871.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28871/head:pull/28871

PR: https://git.openjdk.org/jdk/pull/28871